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a="37972709" X-IronPort-AV: E=Sophos;i="6.08,179,1712646000"; d="scan'208";a="37972709" X-CSE-ConnectionGUID: /oHbJ0bmSHKClRD1Qcfdjg== X-CSE-MsgGUID: bQIQB1kbQjulb/D3IopSaw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,179,1712646000"; d="scan'208";a="33597941" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, peterx@redhat.com, jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan , Yi Sun , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum Subject: [PATCH rfcv2 14/17] intel_iommu: piotlb invalidation should notify unmap Date: Wed, 22 May 2024 14:23:10 +0800 Message-Id: <20240522062313.453317-15-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240522062313.453317-1-zhenzhong.duan@intel.com> References: <20240522062313.453317-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=192.198.163.7; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1716359515762100001 Content-Type: text/plain; charset="utf-8" This is used by some emulated devices which caches address translation result. When piotlb invalidation issued in guest, those caches should be refreshed. Signed-off-by: Yi Sun Signed-off-by: Zhenzhong Duan --- hw/i386/intel_iommu.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index de4e8afcf9..e07daaba99 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2890,7 +2890,7 @@ static void vtd_piotlb_pasid_invalidate(IntelIOMMUSta= te *s, continue; } =20 - if (!s->scalable_modern) { + if (!s->scalable_modern || !vtd_as_has_map_notifier(vtd_as)) { vtd_address_space_sync(vtd_as); } } @@ -2902,6 +2902,9 @@ static void vtd_piotlb_page_invalidate(IntelIOMMUStat= e *s, uint16_t domain_id, bool ih) { VTDIOTLBPageInvInfo info; + VTDAddressSpace *vtd_as; + VTDContextEntry ce; + hwaddr size =3D (1 << am) * VTD_PAGE_SIZE; =20 info.domain_id =3D domain_id; info.pasid =3D pasid; @@ -2912,6 +2915,36 @@ static void vtd_piotlb_page_invalidate(IntelIOMMUSta= te *s, uint16_t domain_id, g_hash_table_foreach_remove(s->iotlb, vtd_hash_remove_by_page_piotlb, &info); vtd_iommu_unlock(s); + + QLIST_FOREACH(vtd_as, &s->vtd_as_with_notifiers, next) { + if (!vtd_dev_to_context_entry(s, pci_bus_num(vtd_as->bus), + vtd_as->devfn, &ce) && + domain_id =3D=3D vtd_get_domain_id(s, &ce, vtd_as->pasid)) { + uint32_t rid2pasid =3D VTD_CE_GET_RID2PASID(&ce); + IOMMUTLBEvent event; + + if ((vtd_as->pasid !=3D PCI_NO_PASID || pasid !=3D rid2pasid) = && + vtd_as->pasid !=3D pasid) { + continue; + } + + /* + * Page-Selective-within-PASID PASID-based-IOTLB Invalidation + * does not flush stage-2 entries. See spec section 6.5.2.4 + */ + if (!s->scalable_modern) { + continue; + } + + event.type =3D IOMMU_NOTIFIER_UNMAP; + event.entry.target_as =3D &address_space_memory; + event.entry.iova =3D addr; + event.entry.perm =3D IOMMU_NONE; + event.entry.addr_mask =3D size - 1; + event.entry.translated_addr =3D 0; + memory_region_notify_iommu(&vtd_as->iommu, 0, event); + } + } } =20 static bool vtd_process_piotlb_desc(IntelIOMMUState *s, --=20 2.34.1